CN201016828Y

CN201016828Y - Tyre bursting sensor

Info

Publication number: CN201016828Y
Application number: CNU2006200524544U
Authority: CN
Inventors: 彭世益; 彭彦均
Original assignee: GUILIN SICHAO AUTO TECHNOLOGY Co Ltd
Current assignee: GUILIN SICHAO AUTO TECHNOLOGY Co Ltd
Priority date: 2006-10-11
Filing date: 2006-10-11
Publication date: 2008-02-06
Anticipated expiration: 2016-10-11

Abstract

A tire burst sensor consists of a pressure sensing unit and a switch. The pressure sensing unit compresses or deforms under a normal tire pressure and recovers to a normal form when the tire bursts or the tire pressure lowers. With the characteristics mentioned above, the driving switch is closes to output a tire burst signal. The tire burst sensor can detect the tire burst signal at first time of the tire burst. The characteristics of the strong tire burst monitoring real-time performance are achieved. And the requirements of long-term, low power consumption and stable operation of a detection system is satisfied.

Description

A kind of sensor of blowing out

Technical field

The utility model relates to the tire safety monitoring technology of vehicle with the Puffer-type tire, specifically is to be used to blow out the sensor of blowing out of monitoring.

Background technology

Can be used in the air pressure detection technique of tyre in motion existing, the TPMS (tire pressure monitoring system) that adopts wireless communication mode is for to make its subsystem energy content of battery keep the working time of several years, and the TPMS subsystem detects an air pressure usually after interval 3s even the dormancy of longer time.And the occupant survives in wishing just to place on and can take safe deceleration measure timely and effectively in 2s～3s after the tyre break; If the air pressure sense cycle of TPMS subsystem is shortened to the monitoring patient 200ms (real-time minimum requirements) that blows out, then the TPMS subsystem energy content of battery will be not enough to keep the needs of 2000 hours steady operations, therefore, no matter existing TPMS is real-time, or mission life all can not satisfy the requirement of blowing out and detecting.

The described noncontact Pressure monitoring of CN200410028564.2, utilize the draught head of tire pressure and atmosphere to act on the principle of film cylinder and spring balancing, make " permanent magnetism post a letter body " with the tire pressure size along the axis direction displacement, " permanent magnetism post a letter body " rotates to the Hall sensor installation site with tire and just can detect the tire pressure signal.It is unsatisfactory that this tire revolves the air pressure real-time of detection that turns around, but also need punch on wheel rim atmosphere introduced tire, must bring the tire safety potential problem thus.

Summary of the invention

The utility model purpose technology is dealt with problems and is: provide a kind of need not be inside and outside tire through hole, real-time and can satisfy the technical scheme that low-power consumption detects the passive tyre explosion detecting sensor of needs, can first accurately obtain signal of tyre burst constantly what blow out by the utility model; Can make and work in low power consumpting state, TPMS subsystem that real-time is low possesses tyre explosion prison ability, and can transmit automatic safe deceleration control after signal of tyre burst is used for tyre break by TPMS.

Technical solution of the present utility model: a kind of sensor of blowing out is characterized in that: the sensor of blowing out is made up of air pressure sensing unit and switch; The air pressure sensing unit is that inside is filled with a kind of gas at least, and the compressible or distortion of volume produces the seal chamber of displacement under gas pressure; Switch is installed on the position of air pressure sensing unit energy pull switch closure when no gas pressure.

The air pressure sensing unit can be metal bellows or sealed at both ends metal spring pipe, can also be that the compressible or distortion of the volume under gas pressure of rubber pneumatic bag or its nonmetallic materials produces the seal chamber of displacement.

Can utilize metal air pressure sensing unit and hard contact to constitute switch; Also can utilize nonmetal air pressure sensing unit that the metal part is installed and constitute switch with hard contact.

Remarkable result of the present utility model is: owing to utilized the air pressure sensing unit to depress compression or distortion in normal tire, and the property driving switch closure output tire detonating signal that form was recovered after tyre break or tire pressure descended; The sensor of blowing out can detect signal of tyre burst in first moment that occurs blowing out, and has both met the real-time characteristics of tyre break monitoring, satisfies the requirement of the long-term low-power consumption steady operation of detection system again.

Description of drawings

Blow out sensor construction figure and electrical schematic diagram that Fig. 1, metal bellows and switch are formed;

Fig. 2, the sensor wheel air pressure of blowing out one on off state figure;

Fig. 3, Fig. 1 sensor of blowing out is electrically connected schematic diagram with the TPMS subsystem;

Fig. 4, metal spring pipe and hard contact constitute the structural drawing and the electrical schematic diagram of the sensor of blowing out of switch;

Fig. 5, Fig. 4 sensor of blowing out is electrically connected schematic diagram with the TPMS subsystem.

Embodiment

Below in conjunction with Fig. 1, Fig. 2, Fig. 3, embodiment 1 of the present utility model is described in detail.

As shown in Figure 1, the sensor of blowing out is made up of air pressure sensing unit 1, switch 2 and shell 3, air pressure sensing unit 1 adopts the inner sealing metal bellows that is filled with certain gas-pressure nitrogen, switch 2 has been selected single-pole double-throw (SPDT) microswitch commonly used for use, shell 3 provides structure to install, and switch 2 is installed on the position that can be subjected to the barometric pressure effect distortion by metal bellows 1 and cause " opening " or " pass " action.

When the switch 2 of the sensor of blowing out is connected (see figure 3) with TPMS subsystem in being installed on same tire, A, B, C end are connected with INT, GND, the Vcc of TPMS subsystem respectively, and wherein, the A-C end is the starting switch that increases, and it is the switch of blowing out that A-B holds.When tire was not inflated, metal bellows 1 was subjected under its air pressure inside P effect, made the A-B end of switch 2 closed, and A-C holds shutoff; This moment, the TPMS subsystem was not owing to be activated, and the closure of the A-B end of switch 2 is not had response; When inflation of tire during to normal tire pressure, metal bellows 1 is influenced by tire pressure and is compressed, and switch 2 is not promoted by metal bellows, and the A-B of switch 2 disconnects, and A-C holds closed TPMS subsystem to be activated into duty.

When automobile enters transport condition, the TPMS subsystem detects the mode of operation of a tire parameter because of after motion sensor experiences wheel movement and enter self predetermined interval 3s or longer time dormancy; When tyre break occurring, rapid drawdown of tire internal gas pressure or leakage, cause metal bellows 1 compressed condition to disappear, metal bellows 1 makes the A-B closure of switch 2 under air pressure inside P effect, this moment, the TPMS subsystem was waken up immediately, in time signal of tyre burst and tire pressure parameter are sent to master control system with wireless mode, provide information for master control system takes safety measures.The A-C end starts the TPMS subsystem once more and plays a role then for after more renewing tyre refiniss TPMS subsystem.

Below in conjunction with Fig. 4, Fig. 2, Fig. 5, embodiment 2 of the present utility model is described in detail.

As shown in Figure 4, the air pressure sensing unit adopts the inner sealed at both ends metal spring pipe 4 of certain gas-pressure nitrogen and hard contact 5 and insulator shell 6 of being filled with to form, the metal part of metal spring pipe 4 and switch contact 5 common formation switch A, B end, shell 6 provides blow out sensor construction and installation.

When the sensor of blowing out is connected (see figure 5) with TPMS subsystem in being installed on same tire, A, B end is connected with INT, the GND of TPMS subsystem respectively.Do not have inflation to make at tire, metal spring pipe 4 is subjected under its air pressure inside P effect, and the A-B end that makes is closed; The TPMS subsystem does not have response owing to do not have the passive movement sensor to start to the closure of A-B end at this moment; When inflation of tire during to normal tire pressure, metal spring pipe 4 is influenced by tire pressure and is out of shape and metal switch contact 5 breaks away from, and A-B holds disconnection.

When automobile enters transport condition, the TPMS subsystem detects the mode of operation of a tire parameter because of after motion sensor experiences wheel movement and enter self predetermined interval 3s or longer time dormancy; When tyre break occurring, rapid drawdown of tire internal gas pressure or leakage, cause the condition of metal spring pipe 4 distortion to disappear, metal spring pipe 4 makes the A-B end closed under the air pressure inside effect, this moment, the TPMS subsystem was waken up immediately, in time signal of tyre burst and tire pressure parameter was sent to master control system with wireless mode.

Claims

1. sensor of blowing out, it is characterized in that: the sensor of blowing out is made up of air pressure sensing unit and switch; The air pressure sensing unit is that inside is filled with a kind of gas at least, and the compressible or distortion of volume produces the seal chamber of displacement under gas pressure; Switch be installed on the air pressure sensing unit produce the displacement effect down can pull switch the closed or position that disconnects.

2. the sensor of blowing out according to claim 1 is characterized in that: the air pressure sensing unit is the metal bellows of sealing.

3. the sensor of blowing out according to claim 1 is characterized in that: the air pressure sensing unit is the metal spring pipe of sealing.

4. the sensor of blowing out according to claim 1 is characterized in that: the air pressure sensing unit is that the compressible or distortion of the volume under gas pressure of rubber pneumatic bag or its nonmetallic materials produces the seal chamber of displacement.

5. the sensor of blowing out according to claim 1 is characterized in that: the metal part and the hard contact of air pressure sensing unit constitute switch.